Hi,
I do not know where you got it from, and who told you that it is not a difficult one.

You will not be able to solve it with the "usual" techniques.

Did you try "Swordfish", "Coloring", "Forcing Chains", "Nishio" before using the brute "Trial and Error" ?

I keep it as a delicate for myself and will take my time to try to kill it slowly with one of the techniques. If it, will not work, I will put it on my list of "UNSOLVED by logic". This list has now "only" about 6 positions (out of a couple of hunderts).

Can you deliver me the "initial position" for my collection and disclose the source?

This puzzle may not be solvable using simple logic alone. It may require look ahead logic that this tool doesn't understand, or trial and error, or it may have more than one solution, or no legal solution. This tool should clearly be able to tell the difference, but can't right now!